Puppet-valve for internal-combustion engines.



F. D. SHEPHERD. PUPPET VALI/E FOR INTERNAL COMBUSTION ENGINES.

' y APPLICATION FILED OCT. 20, 19|?.

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PUPPET VALVE FOR INTERNAL CONIBUSTION ENGINES,

1,263,138. APPLICATION FILED OCT. 20,1917- Patented Apr. 16

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FRANK D. SHEPHERD, OF SALT LAKE CITY, lll'TAI-I.y

:BUFFET-VALVE FOR INTERNAL-OMBUSTION ENGINES. i y.

To all whom t may concern:

Be it known that I, FRANK D. SHEPHERD, of Salt Lake City, in the countyof Salt Lake, and in the State of Utah, have invented a certain new anduseful Improvement in Puppet-Valves for Internal-Combustion Engines, anddo hereby declare that the following is a full, clear, and exactdescription thereof. i

My invention relates to puppet valves for internalV combustion enginesand more particularly has to do with the spring device for seating thevalve. My object generally stated is to facilitate the cleaning of`parts apt to be gummed and to cause sticking and to oil the same andalso to render more aecessible the partsfor removal and replacement, andwith this object in view myinvention consists in the constructionsubstantially hereinafter specified and claimed.

In the 'accompanying drawings:

Figure 1 is a vertical section of enough of Fig. 5 is a view similar toFigs. land 3fof still another embodiment of my invention, 4

Fig. 6 is a view in side elevation of the upper portion of the springcontainer shown in Fig. 5, but with a different form of head for thecontainer-closing plug, e

Fig. 7 is a detail view in Vertical section of parts corresponding' withthose shown in Fig. 6 excepting that a different formof closure for thehole in said plug is illustrated,l e

Fig. 8 is a detail view in vertical section showing a form of the valvefor controlling admission to the spring container different from what isshown inthe other figures,

Fig. 9 is a top plan view lof one of the spring containers or shellsshowing a formation of the upper end thereof for the application ofawrench. f

' Referring tothe drawings 10* designates'- p Specification of LettersPatent. 'Patented AIM-' A 16, 1918, Application led October 20, 1917.Serial No. 197,526. i

yieldingly held upon its seat by ay coil spring 14 that is situatedwithin and housed by a cylindrical shell er container 15 that e isscrewed at one end into a threaded hole in the cylinder head 11. Thespring at one end presses upon a flange `or collar 16 upon a stem 17that passes through a guide holein the portion of the spring container15 that'is screwed in the cylinder head and reaches to or is connectedwith the vvalve 12 so asto transmit through itV the pressure of thespring. The stem 17 may beunconnected with the valve 12 as shown inFig.1, or it may be integral' therewith as shown in Fig. 3; and the collar16may be integral with the stem 17 as shownin Fig. 1,1or loose there-lfrom as shown in Fig. 3and slipped over the reduced upper extremity ofthe stem vand bearing upon a shoulder upon the stem formed by suchreduction. The collar 16 as clearly shown in Fig. 3 has several holes orperforations 18 ruiming through it from top to bottom for the passage ofair during the yvertical movement of the collar to avoid movement beinghindered by air pressure, or suction within the container 15, thelinterior of which under normal conditions is closed in an air tightmanner to the external' air. l ,j

The upper o1' outer end of the container is closed by a removable capv19 screwed thereinto and having a flange 20 which overlaps the outer endof the container 15'and between the latter tween the interior of thespring container 15V and the outside. Projecting from the valvev 24 intothe hole 22, is a hollow stem or guide 25 vwhich may have the cup formshown in Fig. 1 with a number of small holes orperforations 26 throughits side walls close to the valve; or it may have the form shownin Fig.3 in which instead of the holes 26'ther`e are elongated slots 27 whichserve the same purpose as the holes, but separate'the stem into a seriesof distinct fingers. On its oppositel side the valve 24: has acylindrical block or plug 28 that extends partially through the coilspring 14 and serves 'as a filler toA reduce the volume of the space'inthe shell'l or conftainer 15, and thus diminish its capacity for holdinggas which might leak past the stem 17 thereinto and also constitutes alateral support or guide for the' spring so as' to prevent unbalancedsidewise pressure upon the valve-12. The end of the spring opposite thatwhich bears upon the collar 16 bears upon an angular iange 29 integralwith and' between the filler plug 2S and the valve 24 and thus the onespring 14 acts upon both valves 12I and 24C yieldingly to hold the samevto their respectivc'; seats. it will be observed that in a single memberI provide thevalve 2l to close the container' air and gas tight to theoutsideair, the plug 28` which serves the two functions of a filler anda guide or support for the spring 14, and the bearing head '29 for oneend of the spring.

The hole 22 of the cap 19is closed against the entrance of dirt or dustby ay removable filling plug or cover which may have the form of thethimble 30', shown in Figs. 1V and2, 4which is inserted in the hole andheld thereby friction, one or more slits 31 being provided inthe side ofthe thimble to give it the desired elasticity; wor it may' havey theform of the screw plug 300 shown in Fig, 3l that is screwedinto theouter end of the hole 22. Again as shown in Figs. 5 and 6 the holeclosure or cover may be in the form of a spring pressed pivoted plateBOlthat may be swung to uncover the hole 22, the spring 302 serving topressit with sufficient forcev to seal or close the opening and yet allowingthe slight vertical movemen-t necessary" to engageor disengage it withthe latch pin 303. `When the" closing plug or plate is removedy from theouter end of the hole it will be seen that by some suitable instrumentthrust inthe hole 22 the valve 2l'niay be pusheddown off its seat andoil thereby admitted to the interior of the container 15 to find its wayto the surfaces below needing lubrication; or if the parts are gum-med alittle coal oil or other suitable material may be introduced into thecontainer to find its way tothe gummed surfacesY andthe engine then runa few minutes so as to effect the cleaning of the parts by action of thecoal oil or the like thereon,

As shown in Fig. 1 thefillingvplug 28 may be made hollow to securelightness; or as shown in Fig. 3 it may' be made solid and as it isdesirable to give it a length as great as possible without interferingwith the proper lifting of the valve 12, it may be; provided in itslower end as shown in Fig, 3 with a hole 32y to pass over the upper endof the valve stem 17 when the sameras shown .in Fig. 3 is projectedabove the collar 1 6 to receive a grindingtool. As shown in F ig. 5the-filling. plug- 28 is alsoA hollow and it opens up into the guidestem 25 and in thiscase a'filling, 2806isonie light mate! rial'is placedin the chamber in the filling plug 28 in order to prevent theaccumulationr of oil therein.

Preferably, but not necessarily in all cases, a thin disk 33 isplaced inthe bottom of the container 15 below the collar 16 and its thickness issuch that it does not fill'theY additional utility of protecting thespring' from injurious high temperatures which might destroy its temper.

As shown in Figs. 3V and 5 where the valve stem 17 is integral with thevalve 12- they are joined by a fillet 84 wliicliisconcavely curvedand'to accommod'ate'said fillet on the liftingV ofl the valve theunderside of the shellfor container 15 may have aA correspondinglyshaped recess 36 which howeverl immediately adjacent the valve stein hasa flat or plane snr'face 37 that assures the scraping o'i'f of anydeposits on the valve stem and .prevents their` ei`itrance into thevalve stein guide opening.

As shown in Figs. 5 and v7 the valve seat 230 on the filling cap 19 isnot beveledY or conical, biitv isl a plane surface on tliey inner end ofthe cap andz the Yvalve 2210i is similarly shaped'and as shown in Fig.v8 while the conical yform of seat and valve are ein" ployed they havethe reverse arrangement shown in Figs. 1 and 5., that is to say the seatis on a surface projecting from the cap 19-and the valve is concaved ordishechbut this is not as desirable a form as the other because it`tends tov trap or collect 'oil or other liquid introduced through thecap hole 22. Y y

'lll-he top or outer end of the shell or con tainer 15 isgiven a fornior'c'onstri'iction for the application ofy af turning tool forscrewingthe container into its hole in the cylinder head or removing ittherefrom. This renders possible the removal of any one of a gangk orseries of containers without wrench may be readily applied thereto; and

if desired as illustrated inFig. 6,'the flange 200 of thel cap 19V maybe similarly formed so that the same socket wrench Willserve for thecapv as w'ellyas Vfor the container itself. As shown in Fig. 6, the caphole is or location of the means for the applicationv of a tool to thecontainer unless the same is specifically set forth in the appendedclaims.l

The stem on. which the cam acts to lift the valve from its seat may, asshown-)in Figs. 1 and 5 be integral with the valve ,12,

or separate therefrom as shown in Fig. 3.v Vhen made separate from thevalve as shown in Fig. 3 it is simply a straight rod 39 of the rightdiameter to give the desired bearing surface at its ends and its endsmay be case-hardened or tempered to prevent wear or upsetting thereof.This is a cheaper construction than the double integral one and providesa strong stem that will not warp and which will satisfactorily performits duty. I, therefore, consider myself at liberty to employ either aseparate construction of stem and head or an integral construction.

From the variety of the embodiments of my invention that I have shown itwill be seen that my invention is not restricted to the details ofconstruction and it may be carried out with great variety of form ordesign of parts. My invention is applicable to internal combustionengines whether of the L-head or the T-head type and whether they arevertical or horizontal. If desired the shells or containers 15 insteadof -being made in the single or individual form screwed to the cylinderhead can be made in blocks or groups as illustrated in my applicationNo. 145,396, filed February 8, 1917. They may, as shown in the drawings,have air coolin ribs or fins or be made smooth.

By my invention the parts are quickly aocessible, fuel is economized,wear of the valve stem on one side causing the valve to l cock on itsseat and cause leakage is avoided because the valve movements are in astraight line both under the power of the cam and the action of theseating spring and as the valves can turn freely-when working theyautomatically dislodge carbon and foreign matter from the faces which ifnot displaced causes pitting or grooving and leaklaving thus describedmy invention what I claim is:

1. As an improvement in puppet valves for internal combustion engines,the combination of a valve, a Spring for yieldingly holding the valve toits seat, means for transmitting pressure of the spring to the valve, ashell or container housing the spring, an opening leading outward fromsaid container having at its inner end a valve seat and an inwardlymoving valve in the container normally held to, said' seat. N

2. As an improvement in puppet valvesy for internal combustion engines,the combi-I nation of a valve, a spring forA yieldinglyholding the valveto its seat, means for;

transmitting pressure vof the spring to the valve, a shell or containerhousing the spring, and a valved opening leading. outward from saidcontainer, the valve for said opening being yieldingly held to its seatby said spring. Y 1 v i 3. As aneimprovement in puppet valves forinternal combustion engines, the combination of a valve, a coil springfor yieldingly holding the valve to its seat, means for transmittingpressure of the springk to the valve, a `shell or containerV housing thespring, a valved opening leading outward from said container, the valvefor'said opening being yieldingly held to its seat by said spring, and afilling plug extending from the valve into the coils of the spring.

1. As an improvement in puppet valves for internal combustionengines,the combination of a valve,a coil spring for yieldingly holding thevalve to its seat, means for transmitting pressure of the spring to thevalve, a shell or container housing the spring, a valved opening leadingoutward from said container, the valve for said opening being yieldinglyheld to its seat by said spring, and a lling plug extending from thevalve into the coils of the spring, said filling plug being hollow.

5. As an improvement in puppet valves for internal combustion engines,the combination of a valve, a spring for yieldingly holding the valve toits seat, means for transmitting pressure of the spring to the valve, ashell or container housing the spring and a valved opening leadingoutward from said container, the valve for said container having ahollow perforated stem extending into said opening beyond the valveseat. n

6. As an improvement in puppet valves for internal combustion enginesthe combination of a Valve, a spring for yieldingly' holding the valveto its seat, means for transmitting pressure of the spring to the valve,a shell or container housing the spring, a valved opening leadingoutward from said container, and means to close said valved opening at apoint beyond the valve.

7 As an improvement in puppet valves for internal combustion engines thecombination of a valve, a spring for yieldingly holding the valve to itsseat, means for transmitting pressure of the spring to the valve, ashell or container housing the spring, and a removable cap in the outerend of said container having a valve controlled opening passing throughit.

8;y Asr an improvement in puppet valves for internal combustion enginesthe Combinationpressure of the springt@ the valve, a shell or containerhousing the spi-ing, and a re movable Cap in the outer end 0f Saidoonta-iner having a Vva-'lve controlled opening passing through it, thevalve for controlling Said opening beingv held to its seat by saidsprinfr;

9'. As an improvement inpuppet valves for internal combufstion'enginesthe' combi-nation of a valve, a spring for yielclingly hol-cling theValve toits Seat, a shell oi Container for the spring, av steinpassing'tlnough an open ing in the inner encl of Said container andreaching to the valve',- a- Colla-r on Said Stein Within theoontaineupon which one end of the spiingheai"s an opening leading through theouter end ofl the container, a valve fol" said opening and a bearing onsa'icl-Y valve for' the other end of said spring.

10; Ae an improvement in puppet valves` ingtlnough the'outei1 end of thecontainer', a

valve for Said container, a hearing on said valve for the other end ofsaidspi'ing, and' a illing plug' extending from Said bearing into thecoils of the spring In testimony that I ClaimY the 'foregoing I havehereunto Set my hand.

FRANK D. SHEPHERD.

Genie@ ef this patent'may' be' obtained' for vef cents each, byaddressing', the Commissioner of Patents,

Washington, D. G.

